him, was to take a young virgin, and, having adorned her, to lead her to a heathen temple that stood on the shore, with a window looking out to sea. There they left the damsel for the night, and when they came back in the morning they found her a maid no more, and dead. Every month they drew lots, and he upon whom the lot fell gave up his daughter to the jinnee of the sea. The last of the maidens thus offered to the demon was rescued by a pious Berber, who by reciting the Koran succeeded in driving the jinnee back into the sea.

Ibn Batutahs narrative of the demon lover and his mortal brides closely resembles a well-known type of folk-tale, of which versions have been found from Japan and Annam in the East to Senegambia, Scandinavia, and Scotland in the West. The story varies in details from people to people, but as commonly told it runs thus. A certain country is infested by a many-headed serpent, dragon, or other monster, which would destroy the whole people if a human victim, generally a virgin, were not delivered up to him periodically. Many victims have perished, and at last it has fallen to the lot of the kings own daughter to be sacrificed. She is exposed to the monster, but the hero of the tale, generally a young man of humble birth, interposes in her behalf, slays the monster, and receives the hand of the princess as his reward. In many of the tales the monster, who is sometimes described as a serpent, inhabits the water of a sea, a lake, or a fountain. In other versions he is a serpent or dragon who takes possession of the springs of water, and only allows the water to flow or the people to make use of it on condition of receiving a human victim.

It would probably be a mistake to dismiss all these tales as pure inventions of the story-teller. Rather we may suppose that they reflect a real custom of sacrificing girls or women to be the wives of waterspirits, who are very often conceived as great serpents or dragons.

XIII. The Kings of Rome and Alba

1. Numa and Egeria

FROM THE FOREGOING survey of custom and legend we may infer that the sacred marriage of the powers both of vegetation and of water has been celebrated by many peoples for the sake of promoting the fertility of the earth, on which the life of animals and men ultimately depends, and that in such rites the part of the divine bridegroom or bride is often sustained by a man or woman. The evidence may, therefore, lend some countenance to the conjecture that in the sacred grove at Nemi, where the powers of vegetation and of water manifested themselves in the fair forms of shady woods, tumbling cascades, and glassy lake, a marriage like that of our King and Queen of May was annually celebrated between the mortal King of the Wood and the immortal Queen of the Wood, Diana. In this connexion an